Red Hat RHCSA 8 Cert Guide: EX200, 2nd Edition

Appendix B

Memory Tables

Chapter 2

Table 2-2 Standard Input, Output, and Error Overview

Name	Default Destination	Use in Redirection	File Descriptor Number
Computer keyboard	< (same as 0<)	0
Computer monitor	> (same as 1>)	1
STDERR		2>	2

Table 2-3 Common Bash Redirectors

Redirector	Explanation
(same as 1>)	Redirects STDOUT. If redirection is to a file, the current contents of that file are overwritten.
(same as 1>>)	Redirects STDOUT. If output is written to a file, the output is appended to that file.
Redirects STDERR.
Redirects STDERR to the same destination as STDOUT. Notice that this has to be used in combination with normal output redirection, as in ls whuhiu > errout 2>&1.
(same as 0<)	Redirects ...